Racial differences in ambulatory blood pressure and echocardiographic left ventricular geometry

We examined the racial differences in left ventricular (LV) geometric pattern in relation to 24-hour ambulatory blood pressure (BP) monitoring and the presence or absence of a nocturnal BP dip. Our study confirms the blunting of nocturnal BP dip among black hypertensives. Body mass index, rather tha...

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Bibliographic Details
Published in:The American journal of the medical sciences 1998-02, Vol.315 (2), p.101-109
Main Authors: OLUTADE, B. O, GBADEBO, T. D, PORTER, V. D, WILKENING, B, HALL, W. D
Format: Article
Language:English
Subjects:
Arterial hypertension. Arterial hypotension
Biological and medical sciences
Black or African American
Black People
Blood and lymphatic vessels
Blood Pressure - physiology
Blood Pressure Monitoring, Ambulatory
Body Weight
Cardiology. Vascular system
Circadian Rhythm
Clinical manifestations. Epidemiology. Investigative techniques. Etiology
Diastole
Double-Blind Method
Echocardiography
Female
Georgia
Heart Rate
Heart Ventricles - anatomy & histology
Humans
Hypertension - diagnostic imaging
Hypertension - physiopathology
Male
Medical sciences
Middle Aged
Obesity - physiopathology
Systole
Ventricular Function, Left
White People
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Summary:We examined the racial differences in left ventricular (LV) geometric pattern in relation to 24-hour ambulatory blood pressure (BP) monitoring and the presence or absence of a nocturnal BP dip. Our study confirms the blunting of nocturnal BP dip among black hypertensives. Body mass index, rather than race, was a major determinant of left ventricular hypertrophy. We did not observe a difference in prevalence of left ventricular hypertrophy by race. However, left ventricular adaptation to hypertension differed in hypertensive black and white individuals; whereas most of the white patients with Stage 1-2 hypertension had a normal ventricular pattern, LV concentric remodeling and concentric hypertrophy were the most common adaptive ventricular patterns in blacks with Stage 1-2 hypertension. A six-fold higher prevalence of concentric remodeling was observed in blacks as compared with whites. The impaired nocturnal BP dip in blacks may contribute to the different hemodynamic pattern. Determinants of myocardial oxygen consumption were significantly higher in black hypertensives.
ISSN:0002-9629
1538-2990
DOI:10.1097/00000441-199802000-00006